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  • 1970-1974  (3)
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Year
  • 1
    Electronic Resource
    Electronic Resource
    The origin of embryonic laser cracks (1973)
    Springer
    Mechanics of composite materials 9 (1973), S. 68-75 
    Details
    ISSN: 1573-8922
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The problem of the initial stage of crack formation in PMMA subjected to laser action is investigated. It is shown that the cracks develop from gas-filled cavities (centers). These centers have been experimentally investigated, and the center-crack transition carefully studied.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00856012
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Autovibrational development of laser cracks (1973)
    Springer
    Mechanics of composite materials 9 (1973), S. 422-427 
    Details
    ISSN: 1573-8922
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The authors experimentally investigate the discontinuous ("jumping") character of the development of laser cracks in polymethyl methacrylate. The discontinuities arise in such an order that the crack remains rounded, even if the laser beam is rectangular in cross section. The authors estimate the pressure drop in the crack during a "jump."
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00856391
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  • 3
    Electronic Resource
    Electronic Resource
    Profile of a laser crack in polymethyl methacrylate (1973)
    Springer
    Mechanics of composite materials 9 (1973), S. 810-812 
    Details
    ISSN: 1573-8922
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The profile of a laser crack in a transparent dielectric, polymethyl methacrylate (in the free-generation procedure), has been studied by the equal-thickness interference band method. It has been established that zones of changed material, a zone of slow change of profile, and a zone of rapidly changing profile (center of the crack) exist in the cross section of the crack. Values of thickness of the crack are given. Suggestions are expressed as to a possible mechanism of laser damage.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00856282
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    Paper (German National Licenses)
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